Weather Alert in Washington
Special Weather Statement issued July 30 at 5:47AM PDT by NWS Seattle WA
AREAS AFFECTED: San Juan County; Lowlands of Western Whatcom County; Lowlands of Western Skagit and Northwestern Snohomish Counties; Port Townsend Area; Eastern Strait of Juan de Fuca; Western Strait of Juan de Fuca; Northern Washington Coast; Grays Harbor County Coast; Island County
DESCRIPTION: ...TSUNAMI ADVISORY IS IN EFFECT FOR THE WASHINGTON COAST AND STRAIT OF JUAN DE FUCA... * UPDATES...Tsunami waves continue to arrive along the Washington coast and Strait of Juan de Fuca. * LOCAL IMPACTS...A tsunami capable of producing strong currents that may be hazardous to swimmers, boats, and coastal structures does continue. Widespread inundation is NOT expected. * RECOMMENDED ACTIONS...If you are located in this coastal area, move off the beach and out of harbors and marinas. Do not go to the coast to watch the tsunami. Be alert to instructions from your local emergency officials * OBSERVED TSUNAMI WAVE HEIGHTS FROM EARLIER... La Push 1.3 ft Neah Bay 0.3 ft Westport 0.5 ft Toke Point 0.4 ft Port Angeles 0.3 ft Tsunamis often arrive as a series of waves or surges which could be dangerous for many hours after the first wave arrival. The first tsunami wave or surge may not be the highest in the series. * PRELIMINARY EARTHQUAKE INFORMATION... An earthquake occurred with a preliminary magnitude of 8.8. * TIDE INFORMATION... Neah Bay...Low tide of 1.3 ft at 958 AM PDT on Jul 30. High tide of 6.9 ft at 438 PM PDT on Jul 30. La Push...Low tide of 0.9 ft at 943 AM PDT on Jul 30. High tide of 7.4 ft at 415 PM PDT on Jul 30. Westport...Low tide of 1.2 ft at 956 AM PDT on Jul 30. High tide of 8.0 ft at 435 PM PDT on Jul 30. Port Angeles...Low tide of 2.2 ft at 1153 AM PDT on Jul 30. High tide of 6.4 ft at 651 PM PDT on Jul 30. Port Townsend...Low tide of 2.8 ft at 118 PM PDT on Jul 30. High tide of 8.2 ft at 811 PM PDT on Jul 30. Friday Harbor...Low tide of 2.7 ft at 147 PM PDT on Jul 30. High tide of 7.4 ft at 853 PM PDT on Jul 30. Seattle...Low tide of 3.4 ft at 214 PM PDT on Jul 30. High tide of 11.1 ft at 849 PM PDT on Jul 30. Tacoma...Low tide of 3.4 ft at 215 PM PDT on Jul 30. High tide of 11.5 ft at 852 PM PDT on Jul 30. This product will be updated as new information becomes available. Stay tuned to your local news source and NOAA weather radio for further information and updates.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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